Abstract：The discrete element granular model on powder injection molding was established. Powder was treated as granular model according with Newton Law and interaction each other rather than continuous phase, and viscous liquid bridge was simulated by parallel bonding model. Wax-based binder and 17-4ph stainless steel powder were mixed and injection molded, so the standard tensile samples and bending samples were obtained. The uniaxial tension and three-point bending tests were carried on. The results of tests and discrete element simulation were compared and analyzed. The results show that the crack morphology, position, force-displacement curves are consistent. The reliability of discrete element is verified and the micro parameters of discrete element granular model are checked.
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